Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:27:47 2012 Optimize a model with 313 rows, 231 columns and 1011 nonzeros Presolve time: 0.00s Presolved: 313 rows, 231 columns, 1011 nonzeros Variable types: 0 continuous, 231 integer (231 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 0.000000e+00, 126 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 75 63.00000 0.00000 100% - 0s H 0 0 53.0000000 0.00000 100% - 0s 0 0 0.86364 0 77 53.00000 0.86364 98.4% - 0s 0 0 0.90970 0 77 53.00000 0.90970 98.3% - 0s 0 0 0.97879 0 78 53.00000 0.97879 98.2% - 0s 0 0 0.99030 0 79 53.00000 0.99030 98.1% - 0s 0 0 1.00885 0 77 53.00000 1.00885 98.1% - 0s 0 0 1.01786 0 77 53.00000 1.01786 98.1% - 0s 0 0 1.01786 0 77 53.00000 1.01786 98.1% - 0s H 0 0 50.0000000 1.01786 98.0% - 0s H 0 0 46.0000000 1.01786 97.8% - 0s 0 2 1.11765 0 77 46.00000 1.11765 97.6% - 0s * 36 36 23 41.0000000 4.10833 90.0% 28.9 0s * 37 32 22 40.0000000 4.10833 89.7% 28.2 0s * 73 60 25 37.0000000 4.16026 88.8% 28.7 0s * 105 83 21 36.0000000 7.02760 80.5% 28.1 0s * 155 108 28 34.0000000 7.04270 79.3% 26.6 0s * 156 102 27 33.0000000 7.04270 78.7% 26.4 0s * 194 114 15 32.0000000 9.12173 71.5% 26.9 0s * 253 129 17 31.0000000 10.64050 65.7% 26.2 0s * 768 297 26 30.0000000 17.69444 41.0% 23.2 0s * 1535 277 27 29.0000000 18.16216 37.4% 22.2 1s * 3348 169 28 28.0000000 23.00000 17.9% 21.1 2s Explored 3761 nodes (78063 simplex iterations) in 2.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%